Copper-containing dis-, tris- and tetrakisazo dyestuffs of resorcin with beta-oxyethylsulfone-sulfuric acid ester groups



United States Patent Ofifice 3,389,989 Patented Apr. 30, 1968 F 5 :laims. (Cl. 260-145) ABSTRACT OF THE DESCLOSURE Complex copper compounds of water-soluble azo dyestuffs of the resorcin series having the formula:

SQsH

in which R is I OH and R is which compounds may be used for printing and dyeing cellulosic materials with good fastness properties especially with respect to light and to wet processing.

The present invention relates to a process for preparing water-soluble, copper-containing dis-, trisand tetrakisazo dyestulis of resorcin.

Now I have found that valuable, Water-soluble, copper containing dis-, trisand tetrakisazo dyestuffs of resorcin can be prepared by subjecting dyestuffs of the formulae I N=NR2 I I I R l-N=N S 0 311 N =NR2 I SOaH 8103B: wherein R represents the grouping either direct to the oxidative coppering or first to a common coppering and then to an oxidative coppering.

The common (not the oxidative) coppering is advantageously carried out at temperatures Within the range of from about 60 to C., While the oxidative coppering is advantageously carried out within the range of from about 0 to 30 C, preferably about 0 to 8 C.

If, for example, hydrogen peroxide is used as oxidation agent in the oxidative coppering, it is advantageous to add this oxidation agent drop by drop within a period of at least 6 hours and within a pH range of about 5.0 to 5.2. After the oxidative coppering it is advantageous to continue stirring for about 24 hours prior to salting out the dyestuff As copper-yielding compound there may, for example, be used copper sulfate (CuSO -5H 0) or copper acetate ((CH COO) Cu-H O; molecular weight 199.6).

As oxidation agent in the oxidative coppering hydrogen peroxide is especially suitable. The concentration of the hydrogen peroxide used may vary within wide limits. It

4 After the mixture had been stirred for 12 hours, the copper complex of the azo dyestutf corresponding to the formula is advantageous to use a concentration Within the range of from to 50%, preferably about to 35%. However, the concentration of the hydrogen peroxide may also be below 10%.

A suflicient dilution is of importance for carrying out the oxidative coppering. For example, per 1.7 parts by weight of a hydroxyl group to be introduced there should at least be applied 2,000 parts by volume of the reaction medium. In order to indicate an advantageous quantitative proportion of dyestuff: copper compound: oxidation agent (hydrogen peroxide), it is mentioned that per 1.7 parts by weight of a hydroxyl group to be introduced there should advantageously be applied about 30 parts by Weight of CuSO -5H O and 15 parts by weight of hydrogen peroxide of 35% strength.

The copper complex dyestuffs obtained by the process of the present invention are the 1:1 complexes.

The dyestuffs obtained by the process of the present invention may be used not only for printing but also for dyeing cellulose materials. By the processes usually employed in the manufacture of reactive dyestuffs, brown dyeings or prints are obtained on natural or regenerated cellulose materials in the presence of agents having, an alkaline action, which dyeings or prints are distinguished by good fastness properties, especially by a good fastness to wet processing and a good fastness to light.

In contrast to the corresponding dyestuffs which have not been submitted to a coppering or which have only partially been submitted to a coppering, i.e., without the aid of an oxidation agent, the dyestulfs obtained by the process of the present invention are distinguished by a more pronounced depth of color and improved fastness properties, for example by a reduced sensitivity to alkaline compounds and by an improved fastness to scouring and to light.

The following examples serve to illustrate the invention, but they are not intended to limit it thereto:

EXAMPLE 1 57 parts by weight of 1-amino-benZene-4B-oxethylsulfone-sulfuric acid ester, 35 parts by weight of hydrochloric acid of 31.8% strength and 80 parts by weight of ice were introduced into 250 parts by volume of water. The mixture was stirred for half an hour and then 42 parts by weight of an aqueous sodium nitrite solution of 34.8% strength was added at 05 C. During the course of another 90 minutes the diazonium salt suspension showed an alkaline reaction to Congo paper while being stirred, and showed against 4,4'-diamino-diphenyl-methanc-2,2'-sulfone an excess amount of sodium nitrite. This excess amount of nitrite was removed by the addition of amido sulfonic acid.

After the addition of 11 parts by weight of resorcin in the form of an aqueous solution (dissolved in about 350 parts by weight of water), the pH value was increased to 6.0-6.5 by the addition of sodium carbonate. The mixture was then stirred for 15 hours. After the volume of the reaction mixture had been increased to 14,000 parts by volume by the addition of water, 60 parts by weight of copper sulfate and 60 parts by weight of sodium acetate were added. After minutes, 30 parts by weight of hydrogen peroxide of strength were added dropwise during the course of 2 hours at 20-25 C. and at a pH value of 5.0 to 5.2. e

EXAMPLE 2 If instead of 57 parts by weight of l-aminobenzenetpoxethylsulfone-sulfuric acid ester 57 parts by weight of l aminobenzene 3 i-oxethylsulfone-sulfuric acid ester were used and the reaction was otherwise carried out as described in Example 1, there was obtained the copper complex of the azo dyestuff corresponding to the formula NZNQaH SOz-CHr-CHi-O-SCMH l SOr Hr-C 2()SOaH having similar properties as the dyestuif obtained according to Example 1 but a distinctly deeper tint of brown.

EXAMPLE 3 17.3 parts by weight of sulfanil acid were diazotized in the usual manner. After the excess amount of nitrite had been removed, 11 parts by weight of resorcin were added in the form of an aqueous solution. The pH value was increased to 5.0 to 5.5 by the addition of sodium carbonate and sodium bicarbonate and maintained at 8 to 10 C. for 5 hours. Then the diazonium salt of 28.5 parts by weight of 1-amino-benzene-4 3-oxethylsulfone-sulfuric acid ester (prepared as described in Example 1) was added after the excess amount of nitrite had been removed, and the pH value at 10 C. was increased to 6.0 to 6.5 by the addition of sodium carbonate. After 15 hours the reaction mixture was diluted to 4,000 parts by volume, 60 parts by weight of copper sulfate and 60 parts by weight of sodium acetate were added thereto, and after another 30 minutes 30 parts by weight of hydrogen peroxide of 35% strength were introduced during the course of 2 hours at 20-25 C. at a pH value of 5.0 to 5.2. After another 12 hours the copper complex of the azo dyestutf corresponding to the formula EXAMPLE 4 If 28.5 parts by weight of 1-aminobenzene-3,B-oxethylsulfone-sulfuric acid ester were used in Example 3 instead of 28.5 parts by weight of 1-aminobenzene-4B-oxwhich was dyed a somewhat deeper brown tint and possessed similar properties as the dyestuif described in Example 3.

EXAMPLE. 5

21.7 parts by weight of 2-aminophenol-4fi-oxethylsulfone were introduced into 35 parts by volume of concentrated sulfuric acid at 25 -35 C. The reaction mixture 0 tained was stirred overnight at this temperature. The following morning the mixture was decomposed by allowing the mixture to drop onto 360 parts of ice. After the pH value of the solution had been neutralized to 0.8 to 1.0 with a sodium hydroxide solution, the solution was diazotized at 4-8 C. with 13 to 14 parts by volume of an aqueous sodium nitrite solution of 40% strength by weight. After the solution had been stirred for 80 minutes, the excess amount of nitrite Was removed with amidosulfonic acid. After the addition of 11 parts by weight of resorcin in the form of an aqueous solution, the pH value was gradually increased to 6.06.5 by the addition of sodium carbonate. The mixture was stirred for 15 hours at C. The diazonium salt of 17.6 parts by weight of sulfanil acid was added and the pH value was again adjusted to 6.0 to 6.5. After 5 hours the mixture was heated to 6065 C. and, after the addition of 60 parts by weight of copper sulfate and 60 parts by weight of sodium acetate at a pH value of 5.0 to 5.2, this temperature was maintained for two hours. The reaction mixture was diluted to 3,000 parts by volume by the addition of water, and parts by weight of hydrogen peroxide of 35% strength were added thereto during the course of one hour at 25 C. at a pH value of 5.0 to 5.2. After another 15 hours the copper complex of the azo dyestuff corresponding to the formula the copper complex of the azo dyestuif corresponding to the formula was obtained which dyed cotton in the presence of agents having an alkaline action brown tints of good fastness to wet processing and a good fastness to light.

EXAMPLE 7 If in Example 5, instead of the sulfuric acid ester of 21.7 parts by weight of Z-aminophenol-4fi-oxethylsulfone, 18.9 partsby weight of diazotized 2-aminophenol-4-sul- 'fonic acid werecoupled with 11 parts by weight of resorcin, and the azo compound so obtained was coupled, instead of with 17.6 parts by weight of diazotized sulfanil acid, with 28.5 parts by Weight of diazotized 1-aminobenzene-3,8-oxethylsulfone-sulfuric acid ester and the reaction was carried out otherwise as described in Example 5, there was obtained the copper complex of the azo dyestuif corresponding to the formula (I) H H O I S 0 311 I EXAMPLE 8 If instead of 17.6 parts by weight of diazotized sulfanil acid 17.6 parts by weight of diazotized metanil acid were used and the reaction was otherwise carried out as described in Example 5, the copper complex of the azo dyestuif corresponding to the formula SIOBH was obtained.

EXAMPLE 9 28.1 parts by weight of diazotized 1-aminobenzeue-4/3- oxethylsulfone-sulfuric acid ester were added to the aqueous solution of 31.9 parts by weight of 1-amino-8-oxynaphthalene-2,4-disulfonic acid, the pH value of which had been adjusted to 6.9 by the addition of 8 parts by weight of sodium acetate. The pH value of the mixture was then adjusted to 6.2 to 6.5. The mixture was stirred for 3 hours at 10 C.

The red dyestuif so obtained was diazotized at 46 C. by reducing the pH value to 0.8 to 1.0 by means of hydrochloric acid and by adding the aqueous solution of 7.0 parts by weight of sodium nitrite. The solution was stirred for two hours and the excess amount of nitrite removed with amido-sulfonic acid. 11 parts by weight of resorcin were added and the pH value was increased to 5.0 to 5.5 by the addition of sodium carbonate and sodium bicarbonate and maintained at this value for 30 minutes at 10 C. Then the pH value was increased to 6.2 to 6.5 by the addition of sodium carbonate and maintained at this value for 15 hours at 10 C.

Then 28.5 parts by weight of diazotized l-aminobenzene-4B-oxethylsulfonesulfuric acid ester were added to the reaction mixture and the pH vluewas increased to 6.56.8 by means of sodium carbonate and maintained at this value for 12 hours at 10 C. The mixture was diluted to 4,500 parts by volume by the addition of water, and 60 parts by weight of sodium acetate were added thereto. The mixture was left for 30 minutes and then 30 parts by weight of hydrogen peroxide of 35% strength were added at 20-25 C. durin" the course of 3 hours at a pH value of 5.05 .2.

7 8 After another 12 hours the copper complex of the azo which possessed properties similar to those of the dyestuif dyestuff corresponding to the formula obtained according to Example 9.

N|'=NOSO2-CH2-CH2OSO3H OH HO was salted out by means of potassium chloride, filtered off, washed with -a potassium chloridesolution of 15 EXAMPLE 12' strength by weight and with ice water, and dried :at 65 C. If instead of 28.1 parts 'by weight of l-ammobenzene- It dyes cotton in the presence of agents having an al- 4,3-oxyethylsulfone-sulfuric acid ester there were used 28.1 kaline action brown tints of good fastness to wet processparts by Weight of 1-amino-benzene-Bp-oxyethylsulfoneing d a good f t t 1ight sulfuric acid esterand the reaction was otherwise carried EXAMDLE 10 out as described in Example 9, there was obtained the copper complex of the azo dyestufi corresponding to the If instead of 28.1 parts by weight of l-arnino-benzeneformula 4fi-oxyethylsulfone-sulfiuric acid ester there were used 28.1 which possessed properties similar to those of the dyeparts by weight of 1-aminobenzene-3,B-oxyethylsulfoncstuff obtained according to Example 9.

sulfuric acid ester, and instead of 28.5 parts by weight of 1-aminobenzene-45-oxyethylsulfone-surfuric acid ester EXAMPLE 13 28.5 parts by weight of 1-amino-benzene-3,B-oxyethylsul- 5.2 parts by weight of diazotized 1-aminobenzene-413- tone-sulfuric acid ester and the reaction waso therwise oxyethylsulfone-sulfuric acid ester were coupled, as decarried out as described in Example 9, there was obtained scribed in Example 9, with 63.8 parts by weight of 1- the copper complex of the azo dyestuff corresponding to amino-8-oxynaphthalene-2,4-disulfonic acid. The red dyeth f l stuff primarily obtained in this manner was then coupled with 11 parts by weight of resorcin at a pH value of 6.5

SOTOHPCHPO SOQH to 6.8. After the reaction mixture had been stirred for 12 hours at 10 C., the reaction mixture was diluted to 6,000

T parts by volume by the addition of water, and 120 parts by weight of copper sulfate and 120 parts by weight of OH sodium acetate were added thereto. The mixture was left for 30 minutes, and then 60 parts by weight of hydrogen H035 peroxide of 35% were added thereto during the course of 1 H 4 hours at 2025 C. at a pH value of 5.0-5.2.

3 N After another 12 hours the copper complex of the azo S6CHFCHTO SOSH dyestutf corresponding to the formula which possessed properties similar to those of the dyestuft SOrCHz-CHrO-SOa obtained according to Example 9.

EXAMPLE 11 SOs-CHz-CHz-O-SOaH If instead of 28.5 parts by weight of l-aminobenzene- 4/8-oxyethylsulfone-sulfuric acid ester there were used 28.5 parts by weight of l-arninobenzene-3fl-oxyethylsultone-sulfuric acid ester and the reaction was otherwise carried out as described in Example 9, there was obtained the copper complex of the azo dyestuif corresponding to OH E0 the formula 60 HOgS N= Own HO- IIT=NGSOrCHr-CH2OSO3H I I 503E H035 N=N 011 l was isolated as described in Example 9. S0311 O If instead of 56.2 parts by weight of l-aminobenzenekaline action brown tints of a violet hue of good fastness a to wet processing and a good fastness to hght.

9 EXAMPLE 14 If insteado f 56.2 parts by weight of l-aminobenzene- 4,3-oxyethylsulfone-sulfuric acid ester there were used 56.2 parts by weight of 1-amin0benzene-3fi-oxyethylsulfone sulfuric acid ester and the reaction was otherwise carried out as described in Example 13, there was obtained a brown copper complex of the azo dyestufl corresponding to the formula N=N 311 III N possessing properties similar to those of the dyestuif obtained according to Example 13.

EXAMPLE 15 First the diazotized coupling product of 28.1 parts HO r coupled with 11 parts by weight of resorcin according to Example 9. After 15 hours the azo compound thus obtained, which was still capable of coupling, was coupled with the diazotized coupling product of 28.1 parts by weight of diazotized 1-amino-benzene-3fl-oxyethylsulfonesulfuric acid ester and 31.9 parts by weight of l-amino- 8-oXynaphthalene-2,4-disulfonic acid at a pH value of 6.5-6.8.

After the mixture had been stirred for 12 hours, it was subjected to an oxidative coppering as described in EX- arnple 13, and isolated.

There was obtained a brown copper complex of the azo dyestuif corresponding to the formula SOr-CHa-CHr-O-SOEI by weight of diazotized 1 aminobenzene-4fl-oxyethy1- sulfone-sulfuric acid ester and 31.9 parts by weight of 1- 4 amino 8 oxynaphthalene 2,4 disulfonic acid was N OH HOsS SOsH SOaH having properties similar to those of the dyestufi obtained according to Example 13.

SOsH N 11 3. The dyestufi of the formula 4. The dyestufi of the formula 5. The dyestufi of the formula References Cited UNITED STATES PATENTS 3,135,730 Heyna et a1. 260-447 3,135,779 Hoyer et a1. 260-145 XR FLUYD D. HIGEL, Primary Examiner. 

